"The Elder Wand," he said, and he drew a straight vertical line on the parchment. "The Resurrection Stone," he said, and he added a circle on top of the line. "The Cloak of Invisibility," he finished, enclosing both line and circle in a triangle, to make the symbol that so intrigued Hermione. "Together," he said, "the Deathly Hallows."
Sir Petrie has noticed that the relation between the height and the base (ratio 3/2 = 6/4) conceal the Pythagorean Triangle (the first “Pythagorean Triplet”) https://en.wikipedia.org/wiki/Fine-structure_constant#Numerological_explanations_and_multiverse_theory 137
Clara Lemlich led the Uprising of N.Y. garment workers. "I am a working girl, one of those striking against intolerable conditions," she told the crowd. "And I have no further patience for talk." 700 of the women she led on the strike were arrested, 19 were sentenced to labor camps. The next year a fire in her workplace, the Triangle Shirtwaist Factory, killed 146 workers: steel doors had been bolted shut to prevent workers from going on breaks. She lived to be 96.